US orders more testing of chromium-6 in tap water

Jan 13, 2011

Julia Roberts talks to director Steven Soderbergh during the filming of "Erin Brockovich," which highlighted the problem of hexavalent chromium in US water supplies. The Environmental Protection Agency has asked local US communities to test more carefully for the presence of the chemical, a probable carcinogen.

The Environmental Protection Agency has asked local US communities to test more carefully for hexavalent chromium, a probable carcinogen.

After preliminary health studies, the EPA opted Wednesday to class the chemical known as chromium-6 as one likely to cause cancer in humans when ingested over the course of a lifetime.

It adopted a rule of a maximum 0.1 milligrams per liter (100 parts per billion), and urged managers of water systems with their source in ground water be tested two times a year, versus four times a year for systems with surface water sources.

"EPA's latest data show that no public water systems are in violation of the standard," the agency said in a statement.

Still, a private US environmental group has found that drinking water in many American cities contains hexavalent chromium, The Washington Post reported last month.

The study by the Environmental Working Group -- the first nationwide analysis measuring the presence of the chemical in US water systems -- found hexavalent chromium in the tap water of 31 out of 35 cities sampled.

Of those, 25 had levels that exceeded the goal proposed in California, which has been aggressively trying to reduce the chemical in its water supply.

Hexavalent chromium has long been known to cause lung cancer when inhaled, and scientists recently found evidence that it causes cancer in laboratory animals when ingested. It has been linked to liver and kidney damage in animals, as well as leukemia, stomach cancer and other cancers.

A widely used industrial chemical until the early 1990s, hexavalent chromium is still used in some industries, including chrome plating and the manufacturing of plastics and dyes. The chemical can also leach into groundwater from natural ores.

The chemical compound was first made famous in the hit 2000 Hollywood movie "Erin Brockovich" about the eponymous environmental crusader.

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User comments : 5

My doctor daughter asked a wonderful question; "What is the appropriate cost to halve an already small health risk?" A generic homeowner's water quality test costs ~US$100. How much will Cr+6 testing cost on the margin? What will the individual do about it? (My supplier does not offer a Cr-testing kit.)

Chromium is the twenty-first most abundant element on Earth, with an average concentration of (!) 100 ppm.

Gosh, didn't this very site just publish an article last month that showed that Hinckley, CA, whose power company was mau-maued out of $300 million by profuse display of Brockovich's faux ta-tas, had absolutely no incidence of cancer whatsoever outside the norm? Maybe they can get that vaccine doc from Euro to testify for them. I hear he's out of work right now.

Chromium 6 is right up there on the "probable carcinogen" list with Alar, and Saccharine, and Aspartame, and...

@d-huffman....the question is who answers your question...you obviously could care less what actual scientist using the scientific method say...as for your "supplier"...find a new one......i say we text C-6 on your kids...or parents which ever you have...since you know...its prolly just "This is an "Environmental Working Group" hysteria and power grab"..hahaha i bet you'd change your tune real quick. go read a book